Manufacture of squeezing or expressing bowls, rollers, and such like



May 19, 1936. BAMFORD 2,041,520

MANUFACTURE OF SQUEEZING OR EXPRESSING BOWLS, ROLLERS AND SUCH LIKE Filed Feb. 8, 1954 F/CLZ, r

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NV ENTOR: DHNILL Bnmono Patented May 19, 1936 l PATENT OFFICE MANUFACTURE OF PRESSIN G BOWLS, LIKE SQUEEZING B EX- ROLLERS, AND SUCH Daniel Bamford, Middleton, England Application February 8, 1934', Serial No. 710,321 In Great Britain February 9, 1933 '1 Claims. (01. 154-2) This invention is concerned with improvements in and in the manufacture of squeezing or ex-- pressing bowls, rollers, and such like.

The object is to produce bowls, rollers, and such like, to take the place of the known sycamore or built-up bowls or rollers built-up of discs formed from mixtures of paper, cotton or other fibrous or textile materials with various binding materials including rubber, such as are used in bleachworks, dye-houses and elsewhere in connection with textile, paper and other industries.

I make use of discs or'cakes or rings formed in any suitable manner from wood pulp, wood shavings, wood wool, wood chippings,'cocoa-nut l5 fibre, cotton-fibre, jute fibre, coir fibre, paperor such like. These materials or mixtures of these materials, with other fibrous material or loading material are treated either in cut-out disc form, or after production as cakes or-rings of some 20 thickness with latex solution along with other ingredients such as loading and vulcanizing ingredients and accelerators, by impregnating saturating or immersing the discs, or the cakes or rings, with or in the latex solution. The treat- 25 ment, with latex solution may be by mere immersion or under pressure; The discs, or cakes or rings, are then squeezed or pressed. They are then dried and vulcanized.

Finally the discs, or cakes or rings as the case 30 may be, are threaded on a mandrel adapted to receive end ruifs or collars, and the assembled aggregation pressed end-on as is known. The bowl or roller so produced is then turned and ground. I 5 Thereby is obtained a bowl body with the discs,

or cakes or rings, vulcanized and assembled together under pressure, and the whole becomes a homogeneous resilient and waterproof bowl body capable of taking a high finish. 40 I may utilize sheets of various fibrous material or mixtures of such of various kinds, but as a convenient example woodpulp in the form of sheets is extremely suitable. From sheets of such wood-pulp I out out discs having a central gap 45 for the mandrel. Such cut-outdiscs of wood--.

pulp I- saturate with the latex solution either by open immersion or under pressure.

A latex solution which serves my p p se well consists of approximately gallons of latex 50 (about 40 per cent of rubber content), 3lbs. of zinc oxide, 3.15 lbs. of sulphur, and 4% oz. of trimene base. The proportions would be regulated to requirements as to the thickness of the discs or the material of the cakes or rings or as 55 to whether a hard of soft effect is desired.

If rings or cakes pre-moulded, or to be moulded from a mass, are to be used in lieu of mere woodpulp or like discs cut out of sheets, the innumerable cavities or gaps present in the moulded cakes or rings are occupied, or the moulded mass 5 is thoroughly saturated by treatment or immersion if need be under pressure with the latex solution similar to what is described.

The object is to efiect a thorough impregnation or treatment of the cakes or rings with the 10 latex. After treatment of the cakes or rings with the latex solution same are dried and pressed. They are then vulcanized and if necessary finished to form.

In any case, the latex treated and vulcanized 15 discs, or cakes or rings as the case may be, are strung on a mandrel and pressed together in known fashion to produce a homogeneous bowl from the end-on assembly of latex treated discs, or cakes or rings duly vulcanized, thereby ensuring a water-proof, resilient and hard-wearing bowl with a base or built-up body of discs or cakes or rings of fibrous material having the units of discs or cakes or-rings pre-vulcanized before assembly on the mandrel.

My invention is. illustrated by way of example in the accompanying drawing.

In such drawing, Figs. 1 and 2 are a front view and section respectively of a disc or ring a formed from any of the described materials and having a central bored hole a to enable it to be passed onto a mandrel. Fig. 3 shows a disc or ring a immersed in the latex solution contained in a vessel b, the disc or ring being allowed to soak in the solution until thoroughly saturated. A plunger or piston b may be provided to compress the latex solution and thereby to cause a thorough impregnation of the disc or ring a. Fig.

4 shows a series of such soaked or impregnated discs or rings a (after pressing, drying and vul- 40 canizing) assembled on a mandrel 0 having an end plate or ruff c, a. presser plate (1 being used to apply heavy pressure to the other end of the series of discs or rings to press same end-on and produce the complete bowl or roller body. Fig. 5

shows a completed bowl or roller with the discs. or rings a held in compressed fashion on the mandrel c by two end plates or ruffs c suitably secured thereon.

Various kinds of tangled, carded or assembled fibres of fibrous materials or admixtures of such can be made-up either into discs or cakes or rings immersed or impregnated with latex solution pressed and dried and then vulcanized so as to provide rubber treated and vulcanized unit discs, cakes or rings for threading or assembly on a support mandrel, whereby by end pressure 'on the assembly, a bowl or roller of homogeneous character is obtained which can be turned or finished for the purpmes or use desired.

I may introduce loading material into the latex solution, or the mix, as for instance, China clay, French chalk, or other known loading material.

I claim:

1. The method of manufacturing discs for built up bowls which consists in forming a disc of fibrous material, immersing the disc in a bath of latex containing a vulcanizing agent, applying pressure to the bath to cause the bath to impregnate the disc, removing the disc from the bath, pressing the disc to remove excess bath material and compact the disc, drying the impregnated disc, and vulcanizing the dried disc.

2. As a new article of manufacture, a disc for built up bowls having a fibrous body and having the interstices betweenthe fibres filled with vulcanized rubber.

3. The method of manufacturing squeezing bowls which consists in shaping fibrous material such as wood pulp into discs, impregnating said discs with a latex solution containing sulphur, expressing surplus solution from such impregnated discs, drying and vulcanizing these discs,

then compressing together a plurality of such discs assembled on a mandrel and maintaining them in compressed condition thereon.

4. A squeezing bowl comprising a plurality of fibrous material discs which have been impregnated with latex solution containing sulphur and have been pressed, dried and vulcanized, and

having such treated discs compressed together upon a mandrel and held thereon by end collars, and with its cylindrical surface turned and polished.

5. The method of manufacturing discs for use in building-up bowls, which consists in shaping fibrous material such as wood pulp into the form of discs, impregnating said discs with a latex solution containing sulphur, expressing surplus solution from such impregnated discs, drying the discs, and then vulcanizing the dried discs.

6. In and for use in the building-up oi squeezing rolls, a disc of fibrous material such as wood pulp which has been impregnated with latex solution containing sulphur and has been pressed,

dried and vulcanized.

DANIEL BAMFORD. 

